package com.github.niefy.modules.wx.controller;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.RequiredArgsConstructor;
import me.chanjar.weixin.mp.api.WxMpMessageRouter;
import me.chanjar.weixin.mp.api.WxMpService;
import me.chanjar.weixin.mp.bean.message.WxMpXmlMessage;
import me.chanjar.weixin.mp.bean.message.WxMpXmlOutMessage;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.bind.annotation.*;
/**
 * 微信消息
 *
 * @author Binary Wang
 */
@RequiredArgsConstructor
@RestController
@RequestMapping("/wx/msg/{appid}")
@Api(tags = {"微信消息 - 腾讯会调用"})
public class WxMpPortalController {
  private final WxMpService wxService;
  private final WxMpMessageRouter messageRouter;
  private final Logger logger = LoggerFactory.getLogger(this.getClass());
  @GetMapping(produces = "text/plain;charset=utf-8")
  @ApiOperation(value = "微信服务器的认证消息", notes = "公众号接入开发模式时腾讯调用此接口")
  public String authGet(@PathVariable String appid, @RequestParam(name = "signature", required = false) String signature, @RequestParam(name = "timestamp", required = false) String timestamp, @RequestParam(name = "nonce", required = false) String nonce, @RequestParam(name = "echostr", required = false) String echostr) {
    logger.info("\n接收到来自微信服务器的认证消息：[{}, {}, {}, {}]", signature, timestamp, nonce, echostr);
    if (StringUtils.isAnyBlank(signature, timestamp, nonce, echostr)) {
      throw new IllegalArgumentException("请求参数非法，请核实!");
    }
    this.wxService.switchoverTo(appid);
    if (wxService.checkSignature(timestamp, nonce, signature)) {
      return echostr;
    }
    return "非法请求";
  }
  @PostMapping(produces = "application/xml; charset=UTF-8")
  @ApiOperation(value = "微信各类消息", notes = "公众号接入开发模式后才有效")
  public String post(@PathVariable String appid, @RequestBody String requestBody, @RequestParam("signature") String signature, @RequestParam("timestamp") String timestamp, @RequestParam("nonce") String nonce, @RequestParam("openid") String openid, @RequestParam(name = "encrypt_type", required = false) String encType, @RequestParam(name = "msg_signature", required = false) String msgSignature) {
    //		logger.debug("\n接收微信请求：[openid=[{}], [signature=[{}], encType=[{}], msgSignature=[{}],"
    //						+ " timestamp=[{}], nonce=[{}], requestBody=[\n{}\n] ",
    //				openid, signature, encType, msgSignature, timestamp, nonce, requestBody);
    this.wxService.switchoverTo(appid);
    if (!wxService.checkSignature(timestamp, nonce, signature)) {
      throw new IllegalArgumentException("非法请求，可能属于伪造的请求！");
    }
    String out = null;
    if (encType == null) {
      // 明文传输的消息
      WxMpXmlMessage inMessage = WxMpXmlMessage.fromXml(requestBody);
      WxMpXmlOutMessage outMessage = this.route(appid, inMessage);
      if (outMessage == null) {
        return "";
      }
      out = outMessage.toXml();
    }
    else if ("aes".equalsIgnoreCase(encType)) {
      // aes加密的消息
      WxMpXmlMessage inMessage = WxMpXmlMessage.fromEncryptedXml(requestBody, wxService.getWxMpConfigStorage(), timestamp, nonce, msgSignature);
      logger.debug("\n消息解密后内容为：\n{} ", inMessage.toString());
      WxMpXmlOutMessage outMessage = this.route(appid, inMessage);
      if (outMessage == null) {
        return "";
      }
      out = outMessage.toEncryptedXml(wxService.getWxMpConfigStorage());
    }
    logger.debug("\n组装回复信息：{}", out);
    return out;
  }
  private WxMpXmlOutMessage route(String appid, WxMpXmlMessage message) {
    try {
      return this.messageRouter.route(appid, message);
    }
    catch (Exception e) {
      logger.error("路由消息时出现异常！", e);
    }
    return null;
  }
}
